CN105849165A - Foamed molded article - Google Patents

Foamed molded article Download PDF

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Publication number
CN105849165A
CN105849165A CN201480070796.6A CN201480070796A CN105849165A CN 105849165 A CN105849165 A CN 105849165A CN 201480070796 A CN201480070796 A CN 201480070796A CN 105849165 A CN105849165 A CN 105849165A
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CN
China
Prior art keywords
resin
instrument panel
mfr
panel tube
foamex
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201480070796.6A
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Chinese (zh)
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CN105849165B (en
Inventor
小野寺正明
佐野尊
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Kyoraku Co Ltd
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Kyoraku Co Ltd
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Application filed by Kyoraku Co Ltd filed Critical Kyoraku Co Ltd
Priority to CN201910170382.5A priority Critical patent/CN110054823B/en
Publication of CN105849165A publication Critical patent/CN105849165A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/0005—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor characterised by the material
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F10/02—Ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/0633—LDPE, i.e. low density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0608—PE, i.e. polyethylene characterised by its density
    • B29K2023/065—HDPE, i.e. high density polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2500/00—Characteristics or properties of obtained polyolefins; Use thereof
    • C08F2500/12—Melt flow index or melt flow ratio
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2201/00—Foams characterised by the foaming process
    • C08J2201/02—Foams characterised by the foaming process characterised by mechanical pre- or post-treatments
    • C08J2201/03—Extrusion of the foamable blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/06—CO2, N2 or noble gases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/08—Supercritical fluid
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2205/00—Foams characterised by their properties
    • C08J2205/04—Foams characterised by their properties characterised by the foam pores
    • C08J2205/052—Closed cells, i.e. more than 50% of the pores are closed
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2207/00—Foams characterised by their intended use
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2423/04—Homopolymers or copolymers of ethene
    • C08J2423/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/062—HDPE
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

Abstract

Provided is a foamed molded article which can be easily taken out of mold halves. A foamed molded article (1) according to an embodiment of the present invention is formed by clamping a foamed resin, which is melt compounded polyethylene resin, with mold halves, wherein MFR (190 DEG C, g/10 min.) of the molded foamed molded article (1) is less than 0.8, or MFR (190 DEG C, g/10 min.) of the polyethylene resin is 1.0 or less.

Description

Foam molding
Technical field
The present invention relates to the foam molding shaped by the Foamex of molten condition.
Background technology
Such as, the air-conditioning device of automobile etc. uses the idle call airduct of the tubulose of ventilating air.
As there being the foam molding that have employed Foamex known to idle call airduct.Wherein, by foaming agent foam heat Plastic resin obtains described Foamex.Foam molding can realize high thermal insulation and lightweight, therefore its demand simultaneously Measure and constantly expanding.
Blow molding method is widely used, i.e. by segmentation mould in the manufacture method of such foam molding The Foamex of tool clamping molten condition, and the method making resin expansion by blowing air into inside.
Further, in the technical literature filed an application early than the present invention, such as, patent documentation 1 (JP 2005-241157 Number publication) in disclose foaming airduct, this foaming airduct is blow molded into by adding the foaming of supercritical fluid as foaming agent Shape, sets surface roughness and the expansion ratio of outer surface within the specified range.
Further, patent documentation 2 (speciallyying permit No. 4084209 publications) discloses and will coordinate specific height with specific ratio The resin of density polyethylene and specific Low Density Polyethylene is used as the base resin of foaming layer, and by the basis of this foaming layer Resin is foamed by physical blowing agent and shapes the technology of foaming layer.
Prior art literature
Patent documentation
Patent documentation 1: JP 2005-241157 publication
Patent documentation 2: specially permit No. 4084209 publication
Summary of the invention
Problem to be solved by this invention
In above-mentioned patent documentation 1, as foaming airduct material resin disclose use acrylic resin embodiment. Such as patent documentation 1, in the past as the material resin of foam molding, typically use acrylic resin.But, polypropylene The raw material of resin is more expensive, and therefore, such as patent documentation 2, material resin as foam molding also uses polyethylene in recent years Resin.Polyvinyl resin is more relatively inexpensive than general acrylic resin raw material, therefore, it is possible to manufacture foaming and molding at lower cost Body.
Therefore, the present inventor etc. are attempted as the material resin of foam molding by use polyvinyl resin Foam molding needed for acquisition.
But, if by use polyvinyl resin as the material resin of foam molding, then from segmentation mould When tool takes out the foam molding utilizing segmented mold to clamp and to shape, can cause constituting foam molding Resin is close on segmented mold, and therefore the feelings being difficult to take out foam molding from segmented mold can occur Condition.To this end, it is desirable that can easily take out foam molding from segmented mold.
The purpose of the disclosure is to obtain the foam molding that can be easy for taking out from segmented mold.
The means of solution problem
Relating to the foam molding of a form of the disclosure, it is by segmented mold clamping Foamex Shape, wherein, obtain described Foamex by melting mixing polyvinyl resin, described in be foamed into Body is characterised by, the MFR (190 DEG C, g/10 minute) of formed described foam molding Less than (being less than) 0.8.And, it is characterised in that the MFR of described polyvinyl resin (190 DEG C, g/10 Minute) it was less than 1.0 (comprising this number).
The effect of the present invention
The foam molding being easy for taking out from segmented mold can be obtained according to the present invention.
Accompanying drawing explanation
Fig. 1 is the top view of the instrument panel tube 1 illustrating present embodiment.
Fig. 2 is the figure illustrating the fitting portion 102d periphery in instrument panel tube 1.
Fig. 3 is the D-D ' sectional view of Fig. 2.
Fig. 4 is the first figure of the manufacturing process example of the instrument panel tube 1 illustrating present embodiment.
Fig. 5 is the second figure of the manufacturing process example of the instrument panel tube 1 illustrating present embodiment.
Fig. 6 is the 3rd figure of the manufacturing process example of the instrument panel tube 1 illustrating present embodiment.
Fig. 7 is the figure illustrating fitting portion 102d periphery when utilizing segmented mold to clamp.
Fig. 8 is the figure illustrating other manufacturing process examples.
Fig. 9 is to illustrate embodiment, the figure of comparative example.
Detailed description of the invention
(relating to the summary of the foam molding 1 of a form of the disclosure)
First, the embodiment party of the foam molding 1 of a form of the disclosure is related to reference to Fig. 1 and Fig. 9 explanation The summary of formula.Fig. 1 is the figure constituting example of the foam molding 1 of the form illustrating and relating to the disclosure. Fig. 9 is the figure of the foam molding 1 of the form relating to the disclosure for explanation.
The foam molding 1 of the form relating to the disclosure is to be formed by segmented mold clamping Foamex The foam molding 1 of shape, wherein, obtains this Foamex by melting mixing polyvinyl resin.Such as figure Shown in 9, the foam molding 1 of the form relating to the disclosure is characterised by, formed foaming and molding The MFR (190 DEG C, g/10 minute) of body 1 is less than 0.8.Further, the MFR of polyvinyl resin it is characterised by (190 DEG C, g/10 minute) are less than 1.0.
If the MFR of formed foam molding 1 is set to less than 0.8, and by the MFR of polyvinyl resin It is set to less than 1.0, then, when taking out foam molding 1 between segmented mold, constitutes foam molding 1 Foamex will not be close on segmented mold, can take out the most easily and be foamed into from segmented mold Body 1.With reference to the accompanying drawings, the embodiment of the foam molding 1 of the form relating to the disclosure is entered Row describes in detail.In following embodiment, as the example of foam molding 1, illustrate instrument Plate pipe 1.
<configuration example of instrument panel tube 1>
First, with reference to Fig. 1～Fig. 3, the configuration example of the instrument panel tube 1 of present embodiment is illustrated. Fig. 1 is the approximate vertical view of instrument panel tube 1, and Fig. 1 shows have for connecting air-conditioning unit (not Diagram) the instrument panel tube 1 of side of supply unit 105.Fig. 2 shows the fitting portion 102d shown in Fig. 1 The approximate vertical view of periphery.Fig. 3 shows the D-D ' sectional view of Fig. 2.
The instrument panel tube 1 of present embodiment is that to make the cold air provided in air-conditioning unit be circulated to required The instrument panel tube 1 of the light-type on position.
The Foamex blow molding clamped by segmented mold is shaped the instrument panel tube of present embodiment 1, wherein, the polyvinyl resin specified by melting mixing and obtain this Foamex.
The instrument panel tube 1 of present embodiment is more than 1.3 times by expansion ratio, and has the only of multiple bubble Vertical bubble structure (such as, separated foam rate is more than 70%) is constituted.Further, instrument panel tube 1 is average Wall thickness is more than 0.5mm.It addition, surface roughness Rmax of the airduct inner face of instrument panel tube 1 is constituted It is below 200 μm.Surface roughness Rmax is made to be configured to below 200 μm, it is possible to increase effect of ventilating Rate.Preferably, the instrument panel tube 1 of present embodiment tensile failure percentage elongation in-10 DEG C be 40% with On, and the tensile modulus of elasticity in room temperature is 1000kg/cm2Above.It is further preferred that in-10 DEG C Tensile failure percentage elongation be more than 100%.Wherein, for each term definition used in present embodiment As follows.
Expansion ratio: the density of the Foamex used in the forming method of present embodiment described later divided by In the tube body X1 (with reference to Fig. 3) of the instrument panel tube 1 got by the forming method of present embodiment Performance density and the value that obtains is defined as expansion ratio.
Tensile failure percentage elongation: cut off the instrument board got according to the manufacturing process of present embodiment described later After the tube body X1 of pipe 1, keeping is in-10 DEG C, then on the basis of JIS K-7113, as No. 2 shape examinations Test sheet and be set to tensile failure percentage elongation to uphold the value that measures of speed 50mm/ minute.
Tensile modulus of elasticity: cut off the instrument panel tube got according to the manufacturing process of present embodiment described later After the tube body X1 of 1, on the basis of JIS K-7113, as 2 in room temperature (such as, 23 DEG C) The value that number shape test film measures to uphold speed 50mm/ minute is set to tensile modulus of elasticity.
The instrument panel tube 1 of present embodiment, as it is shown in figure 1, be used for connecting air-conditioning unit (not shown) Supply unit 105 be located on the one end in pipe portion 101 (101a～101d).And fitting portion 102 (102a～ 102d) it is located on the other end in pipe portion 101 (101a～101d).Further, by pipe portion 101 (101a～ 101d), supply unit 105, the tube body X1 (with reference to Fig. 3) that fitting portion 102 (102a～102d) is constituted Upper connection has flange part 103 (103a～103g).
Average wall thickness in present embodiment refer to along formed products hollow bearing of trend with about 100mm etc. The meansigma methods of the wall thickness of interval measurement.In the formed products of hollow, across two wall portions that die parting line is fused The wall thickness of the middle position measuring 90 ° of directions of die parting line respectively, average thickness refers to putting down of the wall thickness now measured Average.But, measure position and do not comprise above-mentioned flange part 103 etc..
The inner side of tube body X1 be configured to have can the stream of flow-through fluid, and can ventilating air regulation The cold air of unit.
As it is shown in figure 1, supply the fluid of the inner side to tube body X1 from the peristome 111 of supply unit 105 Stream be divided into four streams of stream A, B-1, B-2, and C.From such supply unit 105 Peristome 111 supplies the fluid of the inner side to tube body X1 by the stream A opening from fitting portion 102a Portion flows out.Further, fluid is flowed out from the peristome of fitting portion 102b by stream B-1.Further, fluid Flowed out from the peristome of fitting portion 102c by stream B-2.Further, fluid passes through stream C from fitting portion The peristome of 102d flows out.
In composition around the stream A of instrument panel tube 1, one end of pipe portion 101a is provided with supply unit 105, And the other end is provided with fitting portion 102a.Further, by pipe portion 101a, supply unit 105, fitting portion 102a structure On the tube body X1 become, connection has flange part 103a and 103e.On flange part 103a, with respect to Other tubular parts that fitting portion 102a connects, are provided with fixing hole 107a for fixer dash board pipe 1. Fastening nut after through not shown bolt in this fixing hole 107a, thus relative to other tubes Part can fixer dash board pipe 1.Further, flange part 103e also is provided with fixing hole 107e.
In composition around the stream B-1 of instrument panel tube 1, one end of pipe portion 101b is provided with supply unit 105, And the other end is provided with fitting portion 102b.Further, by pipe portion 101b, supply unit 105, fitting portion 102b structure On the tube body X1 become, connection has flange part 103b.On flange part 103b, with respect to fitting portion Other tubular parts that 102b connects, are provided with fixing hole 107b for fixer dash board pipe 1.
Further, the position that interval between pipe portion 101a and 101b is narrower is provided with for keeping intensity Bridge part 104e, bridge part 104e are connected to these pipe portions 101a, 101b.
Constituting around the stream B-2 of instrument panel tube 1 is identical with the composition around above-mentioned stream B-1.
Constituting around the stream C of instrument panel tube 1 is identical with the composition around above-mentioned stream A.
It is provided with flange part 103g between pipe portion 101b and 101c, with being connected to pipe portion 101b, 101c, Flange part 103g also is provided with fixing hole 107g.
The instrument panel tube 1 of present embodiment, as it is shown in figure 1, in the outside of tube body X1 (with reference to Fig. 3) Connect and have flange part 103 (103a～103g).Tube body X1 refers to by pipe portion 101 (101a～101d), Supply unit 105, the part that fitting portion 102 (102a～102d) is constituted.
The aperture area of the peristome 100 of the fitting portion 102 of the instrument panel tube 1 of present embodiment is more than pipe portion The aperture area of 101.The aperture area in pipe portion 101 along the stream travel direction with instrument panel tube 1 just refers to The area of the peristome in the pipe portion 101 that the direction handed over cuts off the part in pipe portion 101 and obtains.Such as, can lead to Cross the opening that the shape of fitting portion 102 is configured to the horn-like next peristome 100 that can make fitting portion 102 Area is more than the aperture area in pipe portion 101.Horn-like referring to more becomes big closer to open end aperture area Shape.
<the manufacturing process example of instrument panel tube 1>
Secondly, with reference to Fig. 4～Fig. 6, the manufacturing process example of the instrument panel tube 1 of present embodiment is said Bright.Fig. 4 is the figure of the open state illustrating segmented mold, and Fig. 5 is to illustrate segmented mold from segmented mold side The figure of closed state.Fig. 6 is that from the bearing surface of two segmented molds, the closed state of segmented mold is illustrated segmentation The sectional view of mould 12a side.
First, as shown in Figure 4, by ring-type forging die 11 shooting foaming parison, and sending out drum Alveolitoid base 13 extrudes to parted pattern 12a, between 12b.
It follows that clamping parted pattern 12a, 12b, and, as it is shown in figure 5, use parted pattern 12a, 12b inserts foaming parison 13.Thus, foaming parison 13 is received the cavity to segmented mold 12a, 12b In 10a, 10b.
It follows that such as Fig. 5, shown in Fig. 6, to clamp segmented mold 12a, the state of 12b, be located at Segmented mold 12a, through on the hole specified on 12b is blown into pin 14 and blowout pin 15, and punctures simultaneously Foaming parison 13.If the top being blown into pin 14 and blowout pin 15 enters the inside of foaming parison 13, the most fast Speed from be blown into pin 14 compressed gas of air etc. is blown into foaming parison 13 inside, through foaming parison The inside of 13 blows out compressed gas from blowout pin 15, carries out blow molding with the blowing pressure specified.
It is blown into pin 14 and punctures the peristome 111 of the supply unit 105 being equivalent to instrument panel tube 1 shown in Fig. 1 Position.Thus form mouth blown compressed gas being blown in foaming parison 13 inside.Further, blowout Mouth 15 punctures the fitting portion 102 (102a～102d) being respectively equivalent to instrument panel tube 1 shown in Fig. 1 The position of peristome 100 (100a～100d).Thus formed compressed gas internal from foaming parison 13 Blowout is to outside blow-off outlet.
Thus, compressed gas from be blown into pin 14 be blown into foaming parison 13 inside, and through foaming parison The inside of 13 blows out compressed gas from blowout pin 15.It is thus possible to be blow molded into the blowing pressure specified Shape.
In present embodiment, by compressed gas from be blown into pin 14 be blown into foaming parison 13 in while, from divide Cut mould 12a, the cavity 10a of 12b, aerofluxus in 10b, and eliminate foaming parison 13 and cavity 10a, 10b Between gap so that it is be in negative pressure state.Thus, it is being accommodated in segmented mold 12a, within 12b The internally and externally set pressure differential of the foaming parison 13 of cavity 10a, 10b (represents the inside tool of foaming parison 13 Have higher than outside pressure), foaming parison 13 is pressed against cavity 10a, on the wall of 10b.
But, in above-mentioned forming process, it is not necessary to carry out compressed gas is blown into foaming parison 13 simultaneously The operation of inside and make the outside operation producing negative pressure of foaming parison 13, can carry out double with staggering time Side's operation.
It addition, in the present embodiment, as it is shown in fig. 7, by segmented mold 12a, 12b is with by pressure Z clamping foaming parison 13.Therefore, such as the part being equivalent to tube body X1 in above-mentioned expansion type base 13 Be pressed into cavity 10a by the blowing pressure specified, while 10b, about flange part 103 (103a～ 103g) and be equivalent to the part of plate portion Y1 of bridge part 104 (104e, 104f), to thickness Direction presses, and is compressed into segmented mold 12a, the cavity 10a of 12b, the thickness between 10b.
About foaming parison 13 in be equivalent to tube body X1 part, such as the compressed gas of above-mentioned air etc. From be blown into pin 14 be blown into foaming parison 13 inside, and through foaming parison 13 inside from blowout pin 15 blowout compressed gas.Further, the blowing pressure by specifying the most within a specified time will foaming parison 13 It is pressed into cavity 10a, on 10b.It addition, it is cold from cavity 10a, the 10b side of tube body X1 thickness direction But solidification 5～the foaming parison 13 of about 8 one-tenth.Afterwards, it is not necessary to be compressed the cooling of gas, passing through Under the state of segmented mold 12a, 12b clamping, the foaming parison 13 of the remaining molten condition of spontaneous curing.
It is set to from the temperature being blown into pin 14 and supplying for cooling the compressed gas to foaming parison 13 10 DEG C～30 DEG C, it is preferable that be set as room temperature (such as, 23 DEG C).By the temperature of compressed gas is set It is set to room temperature, it is not necessary to be provided for regulating the temperature control device of the temperature of compressed gas, therefore, it is possible to low cost Shape instrument panel tube 1.It addition, by arranging temperature control device, when supplying to foaming parison from being blown into pin 14 When the temperature of the compressed gas in 13 is less than room temperature, it is possible to shorten the cool time of instrument panel tube 1.Although The difference of the temperature according to compressed gas and different, it is preferable that the cool time of compressed gas, (expression was executed With the time) it is less than 35 seconds.Thus, cool down from cavity 10a, the 10b side of tube body X1 thickness direction Solidification 5～the foaming parison 13 of about 8 one-tenth.And it is able to maintain that the expansion type of the inner face side of tube body X1 The molten condition of base 13.Afterwards, it is not necessary to be compressed the cooling of gas, by segmented mold 12a, Under the state of 12b clamping, it is possible to the remaining foaming parison 13 of spontaneous curing molten condition.
Resin applicatory when shaping the instrument panel tube 1 of present embodiment, preferred molten is mixing specify poly- Vinyl and the Foamex that obtains, so that the MFR of formed products instrument panel tube 1 is less than 0.8.This is Because if the MFR of formed products instrument panel tube 1 is more than 0.8, then cannot obtain and there is good surface Roughness, taking-out, the instrument panel tube 1 of deburring.MFR is to be added by the print cut in formed products The resin of degassing after heat fusing, with JIS K-7210 as standard, in experimental temperature 190 DEG C, test load The value measured under 2.16kg.To surface roughness in embodiment described later, taking-out, deburring is carried out Explanation.
The polyvinyl resin forming Foamex is formed, hybrid resin by the following hybrid resin of melting mixing Refer to be mixed with ldpe resin monomer and high-density polyethylene resin monomer and multiple low-density The hybrid resin of polyvinyl resin, is mixed with the hybrid resin of multiple high-density polyethylene resin, is mixed with low Density Polyethylene Resin and the hybrid resin of high-density polyethylene resin.At this moment, the poly-of formation Foamex is made The MFR (190 DEG C, g/10 minute) of vinyl is in less than 1.0.
Such as, when forming Foamex by two kinds of polyvinyl resins, by the MFR of these two kinds of polyvinyl resins The MFR being set as making the contribution calcutation by these two kinds of polyvinyl resins and obtain meets equation below 1。
A × X/100+B × Y/100 1.0 formula 1
A is the MFR of the first polyvinyl resin
B is the MFR of the second polyvinyl resin
X is the mixed proportion of the first polyvinyl resin forming Foamex
Y is the mixed proportion of the second polyvinyl resin forming Foamex
X+Y=100.
Further, compared with the polyvinyl resin manufactured by tubular process, go out preferably by by high steam The polyvinyl resin of bacterium (Autoclave) method manufacture forms Foamex.This is because compared with passing through The polyvinyl resin employing of tubular process manufacture can by the polyvinyl resin that autoclaving manufactures Improve the formed products i.e. expansion ratio of instrument panel tube 1.Furthermore it is preferred that ldpe resin MFR be 1.0～3.0.
Foamex used when shaping instrument panel tube 1 can be formed by employing comminution of material, can be by pulverizing The burr produced when shaping instrument panel tube 1 obtains this comminution of material.At this moment, compared with by the powder of 100% Broken material forms Foamex, it is preferable that is formed by melting mixing comminution of material and virgin materials and sends out Bubble resin.Virgin materials refers to untapped resin, in the present embodiment, uses above-mentioned polyethylene tree Fat.By using virgin resins, it is possible to avoid constituting the degeneration of the resin of instrument panel tube 1.Melting mixing powder Pure material and virgin materials and when forming Foamex, with comminution of material 90%, the ratio of virgin materials 10% Example melting mixing and form Foamex.
Further, the foaming agent applicatory when forming the instrument panel tube 1 of present embodiment has physical blowing agent, chemical blowing Agent and its mixture.Air, carbon dioxide, nitrogen, the inorganic physical blowing of water etc. can be used as physical blowing agent Agent and butane, pentane, hexane, dichloromethane, the organic physical blowing agents of dichloroethanes etc., and applicable these Supercritical fluid.Wherein, as supercritical fluid, carbon dioxide being preferably used, nitrogen etc. makes instrument panel tube, when When using nitrogen, by critical temperature is set to more than-149.1 DEG C, critical pressure is set to more than 3.4MPa such that it is able to Make instrument panel tube.When using carbon dioxide, critical temperature being set to more than 31 DEG C, critical pressure is set to 7.4MPa Above such that it is able to make instrument panel tube.
Secondly, from segmented mold 12a, 12b takes out above-mentioned formed instrument panel tube 1.Specifically, When clamping the burr on the top being formed at instrument panel tube 1 with the machinery (fixture etc.) specified, beat Open segmented mold 12a, 12b, and from segmented mold 12a, between 12b, take out instrument panel tube 1.
It follows that remove from segmented mold 12a, the hair being formed at around instrument panel tube 1 taken out in 12b The part not such as thorn.Thus, it is possible to the instrument panel tube 1 of the complicated shape shown in acquisition Fig. 1.
As it is shown in figure 1, the instrument panel tube 1 of present embodiment is provided with the fitting portion 102 constituting tube body X1 (102a～102d) and be formed at all peristomes 100 (100a～100d) of supply unit 105, and Flange part 103 (103a～103g) and bridge part 104 (104e, 104f) it is provided with near 111.Therefore, The instrument panel tube 1 of present embodiment can be consolidated relative to other tubular parts in peristome 100, the surrounding of 111 Determine instrument panel tube 1.Furthermore it is possible to reinforce peristome 100, the intensity of the surrounding of 111.But, this reality The monnolithic case of the instrument panel tube 1 executing mode is shaped as the formation of complexity, therefore, from segmented mold 12a, 12b takes out instrument panel tube 1 there is difficulty.
(other manufacturing process examples)
Such as, the instrument panel tube 1 of above-mentioned embodiment can be shaped by the manufacturing process shown in Fig. 8.
Manufacturing process shown in Fig. 8 instead of the foaming parison 13 of drum in above-mentioned manufacturing process Extrude to segmented mold 12a, the method shaped in 12b, but have employed and the Foamex of lamellar is extruded The method shaped to segmented mold 12a, 12b.
As shown in Figure 8, the forming device for other manufacturing process is configured to the pressurizing unit with two 50a, 50b, and there is the segmented mold 12a, 12b identical with above-mentioned manufacturing process example.
Pressurizing unit 50 (50a, 50b), at segmented mold 12a, between 12b with the interval specified substantially Parallel configure with hanging down above-mentioned manufacturing process example comprises with foaming the identical material of parison 13 be in melted The resin sheet P1, P2 of the Foamex of state.For the T mould 28a of extrusion resin sheet material P1, P2, The lower section of 28b is configured with regulation roller 30a, 30b.By this regulation roller 30a, 30b regulation thickness etc..Logical Over-segmentation mould 12a, 12b insert and clamp the resin sheet P1, P2 being so extruded and shape instrument Plate pipe.
The composition of the pressurizing unit 50 (50a, 50b) of two is identical, therefore, illustrates that one squeezes with reference to Fig. 8 Pressure device 50.
Pressurizing unit 50 by being attached to the cylinder 22 of hopper 21, the screw (not shown) being located in cylinder 22, It is connected to the hydraulic motor 20 of screw, accumulator 24 that internal and cylinder 22 is interconnected, is located at accumulator Plunger 26, T mould 28 and a pair regulation roller 30 in 24 are constituted.
The resin particle put into from hopper 21, the screw rotated by hydraulic motor 20 in cylinder 22 is melted Melting and mixing, the Foamex of molten condition is transferred to accumulator 24 and stores a certain amount of Foamex. Further, Foamex is sent by the driving of plunger 26 to T mould 28.Like this, from T mould 28 lower end Extruding gap in extrude the continuous print resin sheet of Foamex in molten condition, joined by interval It is sent downwards while clamping resin sheet by a pair regulation roller 30 put, and resin sheet is dividing Cut mould 12a, hang down between 12b.
Further, T mould 28 is provided with the diebolt 29 of the gap length for regulating extruding gap.Gap The governor motion at interval, in addition to the mechanical mechanism using this diebolt 29, also can possess known Various adjustment structures.
According to such composition, from two T mould 28a, the extruding gap of 28b squeezes out inside there is gas Resin sheet P1, the P2 of bubble unit, and on above-below direction (the expression direction of extrusion), there is same thickness State ground adjustment sheet, and at segmented mold 12a, hang down between 12b.
If resin sheet P1, P2 are configured at segmented mold 12a like this, between 12b, then to horizontal direction Move forward this segmented mold 12a, 12b, will be located in segmented mold 12a, the not shown mould of 12b periphery Resin sheet P1 is close to by plate, on P2.Keep according to the template of segmented mold 12a, 12b periphery like this Resin sheet P1, after P2, by the upper vacuum attraction of cavity 10a, 10b at segmented mold 12a, 12b Resin sheet P1, P2, thus make resin sheet P1, P2 have the shape along cavity 10a, 10b respectively.
Secondly, move forward segmented mold 12a to horizontal direction, clamped after 12b, with above-mentioned shaping Method in the same manner, is blown into pin 14 and blowout pin 15 punctures resin sheet P1, P2.Further, air etc. Compressed gas is blown into resin sheet P1 from being blown into pin 14, the inside of P2, through resin sheet P1, P2's Inside blows out compressed gas from blowout pin 15.So cooling is equivalent to the tube body X1's of instrument panel tube 1 The inner side of part.
Secondly, it is moved rearwards by segmented mold 12a, 12b to horizontal direction, thus segmented mold 12a, 12b The demoulding from instrument panel tube 1.
But, at a pair segmented mold 12a, resin sheet P1, the P2 hung down between 12b, in order to prevent Because of drop-down (Drawdown), the inequality of the wall thickness that contraction (neck-in) etc. causes, need to regulate individually tree The thickness of fat sheet material, extrusion speed, the Thickness Distribution etc. of the direction of extrusion.
The thickness of such resin sheet, extrusion speed, extruding side can be regulated by known various methods To wall thickness etc..
As above-mentioned, for the example of other manufacturing process shown in Fig. 8, with the shaping of Fig. 4～Fig. 6 explanation Method is in the same manner, it is possible to suitably shape the instrument panel tube 1 of present embodiment.Further, as shown in Figure 8 Other manufacturing process examples in, by by two resin sheet P1, P2 arranges different materials, foaming Multiplying power, thickness etc. such that it is able to shape the instrument panel tube 1 of corresponding various condition.
<embodiment>
It follows that according to embodiment, above-mentioned instrument panel tube 1 is illustrated by comparative example.But, not office It is limited to the following examples.
(embodiment 1)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 50 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 50.It is simultaneously used foaming blow-moulding machine, this foaming blow-moulding machine Possesses the screw-type extruder on cylinder with air supply opening.And the supercritical of nitrogen is with the addition of from air supply opening Fluid.By the manufacturing process identical with above-mentioned Fig. 4～Fig. 6, i.e. foamed by following molding condition The shape of blow molding and instrument panel tube 1 shown in Fig. 1 has the sample of the instrument panel tube 1 of same shape Product.
Resin A is that (Asahi Chemical Industry's chemistry (strain) manufactures B470 (density to high-density polyethylene resin =0.949g/cm3, MFR=0.3g/10min, 190 DEG C, polymerization=tubular process).
Resin B is that (it is (close that Sumitomo Chemical (strain) manufactures Sumikathene G201F to ldpe resin Degree=0.919g/cm3, MFR=1.7g/10min, 190 DEG C, polymerization=high pressure steam sterilization (Autoclave) Method).
The resin material gone out by the contribution calcutation of Resin A 50 Quality Mgmt Dept and resin B 50 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 1.0.The MFR of the resin material gone out by contribution calcutation is The value (0.3 × 50/100=0.15) of the MFR (0.3) of Resin A will be calculated by mixed proportion (50%) Value (1.7 × 50/100=0.85) with the MFR (1.7) being calculated resin B by mixed proportion (50%) The value (0.15+0.85=1.00) being added.
Note
Molding condition
The external diameter of parison: 120mm
It is positioned at the resin temperature of mould outlet: 172 DEG C
The wall thickness of parison: 5mm
The average wall thickness of instrument panel tube 1: 0.5mm
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.40.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 4.3 times.
It addition, surface roughness Rmax of the airduct inner face of the instrument panel tube 1 being formed is 200 μm Hereinafter, surface and roughness are good (zero).
It addition, when from segmented mold 12a, when 12b takes out the instrument panel tube 1 being formed, constituting instrument The Foamex of dash board pipe 1 will not be close to segmented mold 12a, 12b, is i.e. easy for from segmented mold Having taken out instrument panel tube 1 in 12a, 12b, therefore taking-out is good (zero).
It addition, be easy for removing the burr of the instrument panel tube 1 being formed, therefore deburring is good Good (zero).
MFR is with JIS K-7210 as standard, enters under experimental temperature 190 DEG C and experiment load 2.16kg The value that row is measured.
Expansion ratio, the density of the Foamex used when shaping instrument panel tube 1 is divided by the instrument being formed The performance density of the tube body X1 (with reference to Fig. 3) of plate pipe 1 and the value that obtains are as expansion ratio.
Surface roughness Rmax represent utilize surface finish measurement machine (Tokyo Seimitsu Co., Ltd manufacture Surfcom470A) maximum height measured is carried out.The measuring point of surface roughness is instrument panel tube 1 All regions of airduct inner face.In the evaluation methodology of surface roughness, when in all spectra, Rmax is Good (zero) it is considered as time below 200 μm.It addition, be considered as when there is Rmax higher than the part of 200 μm Bad (×).
In the evaluation methodology of taking-out, after blow molding, clamp at the machinery (fixture etc.) by specifying Under the state of the burr being formed at the top of instrument panel tube 1, open segmented mold 12a, 12b and from segmentation Mould 12a, when taking out instrument panel tube 1 between 12b, the Foamex constituting instrument panel tube 1 will not be close to In segmented mold 12a, 12b, and it is easy for, from segmented mold 12a, 12b taking out instrument panel tube 1 Situation is considered as well (zero).It addition, open segmented mold 12a, 12b and from segmented mold 12a, 12b Between take out instrument panel tube 1 time, constitute instrument panel tube 1 Foamex be close to segmented mold 12a, 12b, And along with segmented mold 12a, 12b move the situation of more than the instrument panel tube 1 also the most mobile distance specified Be considered as bad (×).Additionally, at segmented mold 12a, the situation that 12b remains Foamex is also considered as Bad (×).Wherein, the burr being formed at instrument panel tube top refers at clamping segmented mold 12a, 12b State under the part of the Foamex outstanding from segmented mold 12a, 12b top.
In the evaluation methodology of deburring, it is being formed at from segmented mold 12a, the instrument taken out in 12b Cutter etc. is utilized to cut otch in a part for the burr of the surrounding of plate pipe 1, when burr removable with hands, It is easy for going the situation of flash removed to be considered as well (zero) from instrument panel tube 1.It addition, when removing flash removed, Burr causes instrument panel tube 1 to deform when being broken and remain in the situation of instrument panel tube 1 or remove flash removed Situation be considered as bad (×).Burr is formed at the part around the parting line of instrument panel tube 1, at instrument board There are the thin-walled portion formed by pinch off between pipe 1 and burr, excise burr in this thin-walled portion.
(embodiment 2)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 60 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 40, in addition, shapes instrument by method same as in Example 1 Plate pipe 1.
The resin material gone out by the contribution calcutation of Resin A 60 Quality Mgmt Dept and resin B 40 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.86.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.37.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 3.9 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 3)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 70 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 30, in addition, shapes instrument by method same as in Example 1 Plate pipe 1.
The resin material gone out by the contribution calcutation of Resin A 70 Quality Mgmt Dept and resin B 30 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.72.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.26.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 2.8 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 4)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 80 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 20, in addition, shapes instrument by method same as in Example 1 Plate pipe 1.
The resin material gone out by the contribution calcutation of Resin A 80 Quality Mgmt Dept and resin B 20 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.58.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.22.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 2.2 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 5)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 90 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 10, in addition, shapes instrument by method same as in Example 1 Plate pipe 1.
The resin material gone out by the contribution calcutation of Resin A 90 Quality Mgmt Dept and resin B 10 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.44.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.18.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 1.6 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 6)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 60 Quality Mgmt Dept Modulate with resin C40 Quality Mgmt Dept, in addition, shape instrument by method same as in Example 1 Plate pipe 1.
Resin C is that (Schulman manufactures CP763 (density=0.919g/cm to ldpe resin3, MFR=1.8g/10min, 190 DEG C, polymerization=tubular process).
(190 DEG C, g/10 divides the MFR of the Foamex obtained by melting mixing Resin A and resin C Clock) it is 0.9.
The resin material gone out by the contribution calcutation of Resin A 60 Quality Mgmt Dept and resin C40 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.90.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.39.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 1.6 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 7)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing Resin A 60 Quality Mgmt Dept Modulate with resin D40 Quality Mgmt Dept, in addition, shape instrument by method same as in Example 1 Plate pipe 1.
Resin D is that (it is (close that Sumitomo Chemical (strain) manufactures SumikatheneF108-1 to ldpe resin Degree=0.921g/cm3, MFR=0.4g/10min, 190 DEG C, polymerization=tubular process).
(190 DEG C, g/10 divides the MFR of the Foamex obtained by melting mixing Resin A and resin D Clock) it is 0.34.
The resin material gone out by the contribution calcutation of Resin A 60 Quality Mgmt Dept and resin D40 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 0.34.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.17.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 1.3 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(embodiment 8)
Foamex is as the material resin of instrument panel tube 1, and it is by melting mixing resin D100 Quality Mgmt Dept Modulate, in addition, shape instrument panel tube 1 by method same as in Example 1.
The MFR of the resin material gone out by the contribution calcutation of resin D100 Quality Mgmt Dept (190 DEG C, g/10 Minute) it is 0.40.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.18.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 1.6 times.
It addition, surface roughness, taking-out, all good (zero) of deburring.
(comparative example 1)
Foamex is as the material resin of instrument panel tube 1, and it passes through melting mixing resin B 100 Quality Mgmt Dept Modulate, in addition, shape instrument panel tube 1 by method same as in Example 1.
The MFR of the resin material gone out by the contribution calcutation of resin B 100 Quality Mgmt Dept (190 DEG C, g/10 Minute) it is 1.70.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 0.80.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 5.0 times.
It addition, surface roughness Rmax of the airduct inner face of the instrument panel tube 1 being formed is 200 μm Hereinafter, therefore surface roughness is good (zero).
It addition, from segmented mold 12a, when 12b takes out the instrument panel tube 1 being formed, constitute instrument Segmented mold 12a is close to by the Foamex of plate pipe 1, on 12b, therefore, it is difficult to from segmented mold 12a, In 12b take out instrument panel tube 1, therefore taking-out bad (×).
In addition, it is difficult to remove the burr of instrument panel tube 1 being formed, therefore deburring bad (×).
(comparative example 2)
Foamex is as the material resin of instrument panel tube 1, and it is by melting mixing resin E60 Quality Mgmt Dept Quality Mgmt Dept modulates with resin B 40, in addition, shapes instrument by method same as in Example 1 Plate pipe 1.
Resin E is that (Asahi Chemical Industry's chemistry (strain) manufactures J240 (density=0.966g/cm to high-density polyethylene resin3, MFR=5.0g/10min, 190 DEG C, polymerization=tubular process).
The resin material gone out by the contribution calcutation of resin E60 Quality Mgmt Dept and resin B 40 Quality Mgmt Dept MFR (190 DEG C, g/10 minute) is 3.68.
The MFR (190 DEG C, g/10 minute) of the instrument panel tube 1 being formed is 3.20.
It addition, the expansion ratio of the instrument panel tube 1 being formed is 4.3 times.
It addition, a surface roughness Rmax part for the airduct inner face of the instrument panel tube 1 being formed is deposited In the part higher than 200 μm, therefore surface roughness bad (×).
It addition, from segmented mold 12a, when 12b takes out the instrument panel tube 1 being formed, constitute instrument Segmented mold 12a is close to by the Foamex of plate pipe 1, on 12b, thus is difficult to from segmented mold 12a, In 12b take out instrument panel tube 1, therefore taking-out bad (×).
In addition, it is difficult to remove the burr of instrument panel tube 1 being formed, therefore deburring bad (×).
Fig. 9 shows embodiment 1～8, the experimental result of comparative example 1 and 2.Fig. 9 show embodiment 1～ 8, the also mixed proportion shaping resin material used during instrument panel tube 1 of comparative example 1 and 2, according to The resin material MFR of this contribution calcutation, the MFR of the instrument panel tube 1 being formed, and by The expansion ratio of the instrument panel tube 1 shaped, surface roughness, taking-out, deburring.
As it is shown in figure 9, the MFR of the instrument panel tube 1 being formed is set to less than 0.8, or, will It is set to less than 1.0 such that it is able to obtain instrument panel tube by the MFR of the resin material of contribution calcutation The surface roughness of 1, taking-out, the instrument panel tube 1 that deburring is the best.
Further, the foaming tree of high-density polyethylene resin and ldpe resin it is mixed with by use Fat such that it is able to obtain the instrument panel tube 1 that expansion ratio is higher.
It addition, Foamex is mixed with the polyvinyl resin manufactured by autoclaving, by adopting The higher instrument panel tube of expansion ratio 1 can be obtained with this Foamex.
It addition, MFR utilizes the ldpe resin of 1.0～3.0, make the instrument board being formed The MFR of pipe 1 less than 0.8, or, make the MFR of the resin material by contribution calcutation be Less than 1.0 such that it is able to obtaining the surface roughness of instrument panel tube 1, taking-out, deburring is the best Instrument panel tube 1.
But, above-mentioned embodiment is the preferred embodiment of the present invention, the invention is not limited in this, Various deformation can be carried out according to the technological thought of the present invention.
Such as, in above-mentioned embodiment, illustrate instrument panel tube 1.However, it is possible to be applicable to rear portion Cooling tube etc..
Reference
1 instrument panel tube
101 pipe portions
102 fitting portions
103 flange parts
104 bridge parts
105 supply units
107 fixing hole
100,111 peristome
10a, 10b cavity
11 ring-type forging dies
12a, 12b segmented mold
13 foaming parisons
14 are blown into pin
15 blowout pins
16 actuators
17 back pressure regulators
A, B, C, F path direction
20 hydraulic motors
21 hoppers
22 cylinders
24 accumulators
26 plungers
28 T moulds
29 diebolt
30 regulation rollers
50 pressurizing units
X1 tube body
Y1 plate portion
Z clamping by pressure

Claims (5)

1. a foam molding, it is shaped by segmented mold clamping Foamex, wherein, logical Crossing melting mixing polyvinyl resin to obtain described Foamex, described foam molding is characterised by,
The MFR (190 DEG C, g/10 minute) of formed described foam molding is less than 0.8.
2. a foam molding, it is shaped by segmented mold clamping Foamex, wherein, logical Crossing melting mixing polyvinyl resin to obtain described Foamex, described foam molding is characterised by,
The MFR (190 DEG C, g/10 minute) of described polyvinyl resin is less than 1.0.
Foam molding the most according to claim 1 and 2, it is characterised in that
Described Foamex is by the first polyvinyl resin and the second polyvinyl resin, with described first poly-second Olefine resin: the mixed proportion of described second polyvinyl resin=X:Y formed (but, be set to X+Y=100),
By MFR and the described second poly-second of the first polyvinyl resin described in described contribution calcutation The MFR that the MFR of olefine resin gets meets equation 1 below
A × X/100+B × Y/100 1.0 formula 1
A is the MFR of described first polyvinyl resin
B is the MFR of described second polyvinyl resin
X is the mixed proportion of described first polyvinyl resin forming described Foamex
Y is the mixed proportion of described second polyvinyl resin forming described Foamex.
Foam molding the most according to claim 3, it is characterised in that
Described first polyvinyl resin is high-density polyethylene resin,
Described second polyvinyl resin is ldpe resin.
Foam molding the most according to claim 4, it is characterised in that
Described ldpe resin is manufactured by autoclaving.
CN201480070796.6A 2013-12-27 2014-12-08 Foam molding Active CN105849165B (en)

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Application Number Priority Date Filing Date Title
CN201910170382.5A CN110054823B (en) 2013-12-27 2014-12-08 Foamed blow-molded article

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